Author: Mark Nelson
MDL-55062 tool_uploaduser: prevent defaults when not selected
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f85800f30510eba1964088725dea1f635461b084
http://github.com/moodle/moodle/commit/f85800f30510eba1964088725dea1f635461b084
+ 3.3 en [invalidupdatetype,tool_uploaduser]